Support dynamic switching between integrated and discrete GPUs on Mac OS X.

content/common/gpu/gpu_messages.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <vector>
 #include <string>
 
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
 #include "content/common/gpu/gpu_info.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/ipc/gpu_command_buffer_traits.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/video/video_decode_accelerator.h"
+#include "ui/gfx/gl/gpu_preference.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/surface/transport_dib.h"
 
 #define IPC_MESSAGE_START GpuMsgStart
 
 IPC_STRUCT_BEGIN(GPUCreateCommandBufferConfig)
   IPC_STRUCT_MEMBER(int32, share_group_id)
   IPC_STRUCT_MEMBER(std::string, allowed_extensions)
   IPC_STRUCT_MEMBER(std::vector<int>, attribs)
   IPC_STRUCT_MEMBER(GURL, active_url)
+  IPC_STRUCT_MEMBER(gfx::GpuPreference, gpu_preference)
 IPC_STRUCT_END()
 
 #if defined(OS_MACOSX)
 IPC_STRUCT_BEGIN(GpuHostMsg_AcceleratedSurfaceNew_Params)
   IPC_STRUCT_MEMBER(int32, renderer_id)
   IPC_STRUCT_MEMBER(int32, render_view_id)
   IPC_STRUCT_MEMBER(gfx::PluginWindowHandle, window)
   IPC_STRUCT_MEMBER(int32, width)
   IPC_STRUCT_MEMBER(int32, height)
   IPC_STRUCT_MEMBER(uint64, surface_id)
@@ skipping 63 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(gl_vendor)
   IPC_STRUCT_TRAITS_MEMBER(gl_renderer)
   IPC_STRUCT_TRAITS_MEMBER(gl_extensions)
   IPC_STRUCT_TRAITS_MEMBER(can_lose_context)
 #if defined(OS_WIN)
   IPC_STRUCT_TRAITS_MEMBER(dx_diagnostics)
 #endif
 IPC_STRUCT_TRAITS_END()
 
 IPC_ENUM_TRAITS(content::CauseForGpuLaunch)
+IPC_ENUM_TRAITS(gfx::GpuPreference)
 IPC_ENUM_TRAITS(gpu::error::ContextLostReason)
 
 IPC_ENUM_TRAITS(media::VideoDecodeAccelerator::Profile)
 
 //------------------------------------------------------------------------------
 // GPU Messages
 // These are messages from the browser to the GPU process.
 
 // Tells the GPU process to initialize itself. The browser explicitly
 // requests this be done so that we are guaranteed that the channel is set
@@ skipping 162 matching lines @@
 
 // Create a TransportTexture corresponding to |host_id|.
 IPC_MESSAGE_CONTROL2(GpuChannelMsg_CreateTransportTexture,
                      int32, /* context_route_id */
                      int32 /* host_id */)
 
 // Request that the GPU process reply with the given message.
 IPC_MESSAGE_CONTROL1(GpuChannelMsg_Echo,
                      IPC::Message /* reply */)
 
+// Asks the GPU process whether the creation or destruction of a
+// command buffer on the given GPU (integrated or discrete) will cause
+// the system to switch which GPU it is using. All contexts that share
+// resources need to be created on the same GPU.
+IPC_SYNC_MESSAGE_CONTROL2_1(GpuChannelMsg_WillGpuSwitchOccur,
+                            bool /* is_creating_context */,
+                            gfx::GpuPreference /* preference */,
+                            bool /* will_cause_switch */)
+
+// Forcibly closes the channel on the GPU process side, in order to
+// have the side effect that all contexts associated with this
+// renderer go into the lost state.
+IPC_MESSAGE_CONTROL0(GpuChannelMsg_CloseChannel)
+
 //------------------------------------------------------------------------------
 // GPU Command Buffer Messages
 // These are messages between a renderer process to the GPU process relating to
 // a single OpenGL context.
 // Initialize a command buffer with the given number of command entries.
 // Returns the shared memory handle for the command buffer mapped to the
 // calling process.
 IPC_SYNC_MESSAGE_ROUTED2_1(GpuCommandBufferMsg_Initialize,
                            base::SharedMemoryHandle /* ring_buffer */,
                            int32 /* size */,
@@ skipping 189 matching lines @@
 
 // Confirm decoder has been reset.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_ResetDone)
 
 // Decoder has faced end of stream marker in the stream.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_EndOfStream)
 
 // Video decoder has encountered an error.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_ErrorNotification,
                     uint32) /* Error ID */